Node.js Sequelize.js Defining Models
Example
There are two ways to define models in sequelize; with sequelize.define(...), or sequelize.import(...). Both functions return a sequelize model object.
1. sequelize.define(modelName, attributes, [options])
This is the way to go if you'd like to define all your models in one file, or if you want to have extra control of your model definition.
/* Initialize Sequelize */
const config = {
username: "database username",
password: "database password",
database: "database name",
host: "database's host URL",
dialect: "mysql" // Other options are postgres, sqlite, mariadb and mssql.
}
var Sequelize = require("sequelize");
var sequelize = new Sequelize(config);
/* Define Models */
sequelize.define("MyModel", {
name: Sequelize.STRING,
comment: Sequelize.TEXT,
date: {
type: Sequelize.DATE,
allowNull: false
}
});
For the documentation and more examples, check out the doclets documentation, or sequelize.com's documentation.
2. sequelize.import(path)
If your model definitions are broken into a file for each, then import is your friend. In the file where you initialize Sequelize, you need to call import like so:
/* Initialize Sequelize */
// Check previous code snippet for initialization
/* Define Models */
sequelize.import("./models/my_model.js"); // The path could be relative or absolute
Then in your model definition files, your code will look something like this:
module.exports = function(sequelize, DataTypes) {
return sequelize.define("MyModel", {
name: DataTypes.STRING,
comment: DataTypes.TEXT,
date: {
type: DataTypes.DATE,
allowNull: false
}
});
};
For more information on how to use import, check out sequelize's express example on GitHub.
